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Hitachi RAS-18G5 User Manual

Hitachi RAS-18G5
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NO. 0485E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
MARCH 2011
Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
RAS-18G5 RAC-18G5
(WALL TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
1030
295
207
12
RAS-18G5
CONTENTS
SPECIFICATIONS ------------------------------------------------------ 4
HOW TO USE ---------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM ---------26
MAIN PARTS COMPONENT --------------------------------------28
WIRING DIAGRAM ---------------------------------------------------30
CIRCUIT DIAGRAM --------------------------------------------------31
PRINTED WIRING BOARD LOCATION DIAGRAM --------33
BLOCK DIAGRAM ----------------------------------------------------35
BASIC MODE ----------------------------------------------------------37
REFRIGERATING CYCLE DIAGRAM---------------------------43
DESCRIPTION OF MAIN CIRCUIT OPERATION -----------44
AUTO SWING FUNCTION -----------------------------------------48
SERVICE CALL Q & A ----------------------------------------------49
TROUBLE SHOOTING ----------------------------------------------54
PARTS LIST AND DIAGRAM --------------------------------------57
RAS-18G5/RAC-18G5
RAC-18G5
COOLING
INDOOR UNIT
OUTDOOR UNIT
1 Ø, 50 Hz, 220-230 V
1620-1620
7.70-7.40
5.25-5.25
17,910
850
650
298
47
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Hitachi RAS-18G5 Specifications

General IconGeneral
BrandHitachi
ModelRAS-18G5
CategoryAir Conditioner
LanguageEnglish

Summary

Safety During Repair Work

Working Standards for Preventing Breakage of Semiconductors

Specifications

How to Use

Names and Functions of Each Part

Indoor Unit

Detailed identification and function of indoor unit components.

Outdoor Unit

Detailed identification and function of outdoor unit components.

Model Name and Dimensions

Lists model names and their physical dimensions.

Safety Precaution

Precautions During Installation

Crucial safety measures to follow during unit installation.

Precautions During Shifting or Maintenance

Safety guidelines for moving and performing maintenance.

Precautions During Operation

Essential safety rules for operating the air conditioner.

Names and Functions of Remote Control Unit

Remote Controller

Explains the remote control's display, buttons, and signal transmission.

Precautions for Use

Important handling and placement guidelines for the remote controller.

Cooling Operation

Dehumidifying Operation

Circulation Operation

How to Set the Sleep Timer

Explanation of the Sleep Timer

How the sleep timer automatically adjusts fan speed and temperature.

How to Set the Timer

Off Timer Reservation

Procedure for setting the unit to turn off automatically.

On Timer Reservation

Procedure for setting the unit to turn on automatically.

Adjusting the Air Deflectors

How to Exchange the Batteries in the Remote Controller

The Ideal Ways of Operation

Suitable Room Temperature

Recommended temperature ranges for efficient operation.

Install Curtain or Blinds

Tips to improve efficiency by managing solar heat gain.

Ventilation

Importance of regular room ventilation for air quality.

Effective Usage Of Timer

Strategies for optimizing comfort using timer functions.

Do Not Forget To Clean The Air Filter

Guidance on air filter maintenance for optimal performance.

Please Adjust Suitable Temperature For Baby And Children

Special considerations for temperature and airflow for vulnerable users.

For User's Information

The Air Conditioner and the Heat Source in the Room

How internal heat loads affect cooling performance.

Not Operating For a Long Time

Procedures for safely storing the unit during extended non-use.

When Lightning Occurs

Safety protocols to follow during thunderstorms.

Interference From Electrical Products

Recommendations to prevent electromagnetic interference.

Attaching the Air Purifying Filters

Maintenance

Pre-Filter

Procedures for cleaning the pre-filter to maintain airflow and efficiency.

Washable Front Panel

Maintenance Before Long Off Period

Regular Inspection

After Sale Service and Warranty

When Asking for Service, Check the Following Points

A checklist of common issues and checks before contacting service.

Construction and Dimensional Diagram

Main Parts Component

Thermostat

Specifications and operational data for the thermostat component.

Fan Motor

Specifications, resistance values, and connection diagram for the fan motor.

Compressor Motor

Wiring Diagram

Circuit Diagram

Printed Wiring Board Location Diagram

Block Diagram

Basic Mode

Description of Main Circuit Operation

On / Off

Explanation of the ON/OFF functions and timer operations.

Reset Circuit

Buzzer Circuit

Receive Circuit

Service Operation Circuit

Auto Swing Function

Service Call Q & A

Trouble-Shooting

Parts List and Diagram

Indoor Unit

Visual identification and part numbers for the indoor unit components.

Outdoor Unit

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